International Earth Rotation Service (IERS). Annual report for 1990.

Contents: I. General information. 1. Organization of the International Earth Rotation Service. 2. The rotation of the Earth and related space-time references. II. Central Bureau results. 1. Global analysis up to 1990. 2. Implementation of the IERS Celestial Reference Frame. 3. Implementation of the IERS Terrestrial Reference Frame. 4. Evaluation of the Earth Orientation Parameters. III. Sub-bureaux reports. 1. Sub-Bureau for Rapid Service and Predictions. 2. Sub-Bureau for Atmospheric Angular Momentum. IV. Coordinating centres reports. 1. Very Long Baseline Interferometry (VLBI). 2. Lunar Laser Ranging (LLR). 3. Satellite Laser Ranging (SLR). V. IERS Earth Rotation and Reference Frames Data Bank. 1. Central Bureau. 2. Sub-Bureau for Rapid Service and Predictions.